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Finding the Fourth Proportional to 73,117.94, 109,717.90 and 39,840.32

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Solution

The fourth proportional to 73,117.94, 109,717.90 and 39,840.32 is: 59,782.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,117.94 : 109,717.90 = 39,840.32 : x
  2. Step 2: Convert to fraction form
    73,117.94/109,717.90 = 39,840.32/x
  3. Step 3: Cross multiply
    73,117.94x = 109,717.90 × 39,840.32
  4. Step 4: Simplify right side
    73,117.94x = 4,371,196,245.73
  5. Step 5: Solve for x
    x = 4,371,196,245.73/73,117.94
  6. Step 6: Final answer
    x = 59,782.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.